body,html
  line-height:1
  font-weight:200
  font-family 'PingFang SC','STHeitiSC-Light','Helvetica',arial,
  Sans-Serif


.clearfix
  display:inline-block
  &:after
   content:"."
   display :block
   height:0
   line-height:0
   clear:both
   visibility:hidden

@media(-webkit-min-device-pixel-ratio:1.5),(min-device-pixel-ratio: 1.5)
  .border-1px
   &::after
      -webkit-transform: scaleY(0.7)
      transform :scaleY(0.7)


@media(-webkit-min-devixce-pixel-ratio:2),(min-device-pixel-ratio: 2)
  .border-1px
    &::after
      -webkit-transform: scaleY(0.5)
      transform :scaleY(0.5)
